chorus vs singing

chorus and singing both are nouns.

Word	Noun	Adjective	Verb	Adverb
chorus	Yes	No	Yes	No
singing	Yes	Yes	No	No

chorus (noun)	singing (noun)
the part of a song where a soloist is joined by a group of singers	the act of singing vocal music
any utterance produced simultaneously by a group	disclosing information or giving evidence about another
a group of people assembled to sing together
a body of dancers or singers who perform together
a company of actors who comment (by speaking or singing in unison) on the action in a classical Greek play

chorus (adjective)	singing (adjective)
	smooth and flowing

chorus (verb)	singing (verb)
utter in unison
sing in a choir